Open Access
Table A.1
Columns for the main catalogue. ‘Type’ gives the Python data type and its length in bits.
| Column name | Type | Units | Description |
|---|---|---|---|
| Source_Name | bytes184 | Object identifier (ILT name) | |
| RA | float64 | deg | Radio right ascension (mean position) |
| DEC | float64 | deg | Radio declination (mean position) |
| E_RA | float64 | arcsec | Error on radio right ascension |
| E_DEC | float64 | arcsec | Error on radio declination |
| Total_flux | float64 | mJy | 144-MHz total flux density |
| E_Total_flux | float64 | mJy | Error on total flux density |
| Peak_flux | float64 | mJy/beam | 144-MHz peak flux density |
| E_Peak_flux | float64 | mJy/beam | Error on peak flux density |
| S_Code | bytes8 | PYBDSF source code or Z for composite source | |
| Mosaic_ID | bytes88 | LoTSS mosaic of source image | |
| Maj | float64 | arcsec | Major axis of fitted Gaussian |
| Min | float64 | arcsec | Minor axis of fitted Gaussian |
| PA | float64 | deg | Position angle of fitted Gaussian |
| E_Maj | float64 | arcsec | Error on major axis |
| E_Min | float64 | arcsec | Error on minor axis |
| E_PA | float64 | deg | Error on position angle |
| DC_Maj | float64 | arcsec | Deconvolved major axis of fitted Gaussian |
| DC_Min | float64 | arcsec | Deconvolved minor axis of fitted Gaussian |
| DC_PA | float64 | deg | Deconvolved position angle of fitted Gaussian |
| Isl_rms | float64 | mJy/beam | rms noise in island |
| FLAG_WORKFLOW | int64 | Flag for workflow status (internal) | |
| ID_flag | int64 | Flag for workflow status (internal) (5) | |
| Prefilter | int64 | Prefilter status (internal) | |
| Postfilter | int64 | Postfilter status (internal) | |
| lr_fin | float64 | Final likelihood ratio value (internal) | |
| optRA | float64 | deg | Optical right ascension (see Position_from) |
| optDec | float64 | deg | Optical declination (see Position_from) |
| Composite_Size | float64 | arcsec | Max size of convex hull surrounding components for composite sources |
| Composite_Width | float64 | arcsec | Transverse size of convex hull surrounding components for composite sources |
| Composite_PA | float64 | deg | Position angle on the sky of longest axis of convex hull |
| Assoc | int64 | Number of components used to form composite source | |
| ID_Qual | float64 | Quality of association from RGZ(L) | |
| Assoc_Qual | float64 | Quality of association from RGZ(L) | |
| Blend_prob | float64 | Blend probability from RGZ(L) or manual flagging) | |
| Other_prob | float64 | Other problem probability from RGZ(L) | |
| Created | bytes192 | Origin of radio component assignment | |
| Position_from | bytes136 | Origin of optRA, optDec | |
| Renamed_from | bytes184 | Original name e.g. in RGZ if a composite source | |
| ID_RA | float64 | deg | Right ascension of positional match in Legacy/WISE crossmatch catalogue |
| ID_DEC | float64 | deg | Declination of positional match in Legacy/WISE crossmatch catalogue |
| UID_L | bytes128 | Legacy ID if any | |
| UNWISE_OBJID | bytes128 | UNWISE ID if any | |
| ID_NAME | bytes128 | Legacy ID if present else WISE ID else blank if no ID exists | |
| Separation | float64 | Offset between optRA, optDec and ID_RA, ID_DEC (non-zero only for visual inspection) | |
| Legacy_ID | int64 | Unique source ID combining release, brick ID and objid | |
| HPX | int64 | Healpix of Legacy brick (internal) | |
| release | int64 | Legacy release number | |
| brickid | int64 | Legacy brick ID | |
| objid | int64 | Legacy object ID | |
| maskbits | int64 | bitwise mask indicating that an object touches a pixel in the ‘coadd/*/*/*maskbits*’ maps, as catalogued on the DR8 bitmasks page | |
| fracflux_g | float64 | Profile-weighted fraction of the flux from other sources divided by the total flux in g (typically [0,1]) | |
| fracflux_r | float64 | Profile-weighted fraction of the flux from other sources divided by the total flux in r (typically [0,1]) | |
| fracflux_z | float64 | Profile-weighted fraction of the flux from other sources divided by the total flux in z (typically [0,1]) | |
| type | bytes32 | Morphological model (1) | |
| ra | float64 | deg | Right ascension of match in Legacy catalogue |
| dec | float64 | deg | Declination of match in Legacy catalogue |
| pstar | float64 | Star likelihood based on GMM modelling (type=‘PSF’ sources only) | |
| star | bytes40 | Likely star based on pstar or proper motion (deprecated), blank if no match | |
| ANYMASK_OPT | bytes40 | Bitwise mask set if the central pixel from any image satisfies each condition in any of g, r or z as catalogued on the DR8 bitmasks page | |
| gmmcomp | bytes16 | Gaussian Mixture Model component to which source belongs (and hence the gpz++ class used for prediction) | |
| zphot | float64 | Photo-z estimate | |
| zphot_err | float64 | Predicted 1-sigma uncertainty on photometric redshift (after magnitude calibration) | |
| var.density | float64 | gpz++ predicted variance from density of training set | |
| var.tr.noise | float64 | gpz++ predicted variance from noise in training set | |
| var.in.noise | float64 | gpz++ predicted variance from noise in fluxes used in prediction | |
| flag_qual | int64 | Predicted photo-z quality flag, 0 if bad, 1 if good (2) | |
| zspec_sdss | float32 | SDSS spectroscopic redshift if available | |
| zwarning_sdss | int32 | 0 if SDSS redshift is good, 1 if bad | |
| plate_sdss | int32 | SDSS plate number | |
| mjd_sdss | int32 | SDSS MJD | |
| fiberid_sdss | int32 | SDSS fibre ID | |
| z_hetdex | float32 | HETDEX spectroscopic redshift if available | |
| z_hetdex_conf | float32 | HETDEX spectroscopic redshift confidence | |
| hetdex_sourceid | int64 | HETDEX source ID | |
| z_desi | float64 | DESI spectroscopic redshift if available | |
| z_desi_err | float64 | DESI spectroscopic redshift error | |
| desi_sourceid | int64 | DESI source ID | |
| 2RXS_ID | bytes168 | ID in 2RXS | |
| XMMSL2_ID | bytes184 | ID in XMM source catalogue | |
| Resolved | bool | Boolean flag to indicate whether source is resolved | |
| LAS | float64 | arcsec | Estimate of angular size, only valid for sources with Resolved == True |
| LAS_from | bytes80 | Source for the LAS column | |
| z_best | float64 | Spec-z if available and good, else photo-z if available and good, else blank (3) | |
| z_source | bytes48 | String describing origin of z_best | |
| Size | float64 | kpc | LAS times angular size distance (4) |
| L_144 | float64 | W/Hz | Radio luminosity in W/Hz for alpha=0.7 (4) |
| LM_size | float64 | arcsec | Size from LoMorph code |
| LM_flux | float64 | mJy | Flux density from LoMorph code |
| Bad_LM_flux | bool | Flag to say that LoMorph flux is bad | |
| Bad_LM_image | bool | Flag to say that LoMorph mask is bad | |
| Field | bytes48 | Which of the two fields the data come from | |
| Legacy_Coverage | bool | Flag to say whether source is in the DESI Legacy sky area | |
| mag_g | float32 | mag | Magnitude in g-band |
| magerr_g | float32 | mag | Magnitude error in g-band, or blank for upper limit |
| mag_r | float32 | mag | Magnitude in r-band |
| magerr_r | float32 | mag | Magnitude error in r-band, or blank for upper limit |
| mag_z | float32 | mag | Magnitude in z-band |
| magerr_z | float32 | mag | Magnitude error in z-band, or blank for upper limit |
| mag_w1 | float32 | mag | Magnitude in WISE band 1 |
| magerr_w1 | float32 | mag | Magnitude error in WISE band 1, or blank for upper limit |
| mag_w2 | float32 | mag | Magnitude in WISE band 2 |
| magerr_w2 | float32 | mag | Magnitude error in WISE band 2, or blank for upper limit |
| mag_w3 | float32 | mag | Magnitude in WISE band 3 |
| magerr_w3 | float32 | mag | Magnitude error in WISE band 3, or blank for upper limit |
| mag_w4 | float32 | mag | Magnitude in WISE band 4 |
| magerr_w4 | float32 | mag | Magnitude error in WISE band 4, or blank for upper limit |
| WISE_Src | bytes80 | Origin of the WISE measurements | |
| Mass_median | float64 | dex(solMass) | Mass estimate |
| Mass_l68 | float64 | dex(solMass) | 68% lower confidence bound on mass |
| Mass_u68 | float64 | dex(solMass) | 68% upper confidence bound on mass |
| g_rest | float64 | mag | Rest-frame g-band magnitude from SED fit |
| r_rest | float64 | mag | Rest-frame r-band magnitude from SED fit |
| z_rest | float64 | mag | Rest-frame z-band magnitude from SED fit |
| U_rest | float64 | mag | Rest-frame U-band magnitude from SED fit |
| V_rest | float64 | mag | Rest-frame V-band magnitude from SED fit |
| J_rest | float64 | mag | Rest-frame J-band magnitude from SED fit |
| K_rest | float64 | mag | Rest-frame K-band magnitude from SED fit |
| w1_rest | float64 | mag | Rest-frame WISE band-1 magnitude from SED fit |
| w2_rest | float64 | mag | Rest-frame WISE band-1 magnitude from SED fit |
| flag_mass | bool | True if a mass is measured and reliable | |
| r_50 | float32 | arcsec | Half-light radius of Legacy optical exponential/DeVaucouleurs/composite model |
| r_50_err | float32 | arcsec | 1-sigma uncertainty on r_50 |
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